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Why are some of the elements pulled out and shown below the others?
Wiki User
∙ 11y ago
The actinides (mostly f-block elements) and lanthanides (rare earth elements) display properties of their own periods, although having proton counts within the periods 6 and 7. They are not assigned to sequential groups.
Wiki User
∙ 11y ago
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What are the names of the two sets of elements found below the Periodic Table?
They are called the Lanthanide series and the Actinide series as shown in http://www.syvum.com/cgi/online/serve.cgi/squizzes/chem/ptable.html
How many elements shown in the periodic table do not occur in nature on earth?
118 total - 92 natural elements= 26 elements that do not naturally occur===========================
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What are the names of the two sets of elements found below the Periodic Table?
They are called the Lanthanide series and the Actinide series as shown in http://www.syvum.com/cgi/online/serve.cgi/squizzes/chem/ptable.html
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How many elements shown in the periodic table do not occur in nature on earth?
118 total - 92 natural elements= 26 elements that do not naturally occur===========================
